Squawk Alley

… researcher eMarketer estimated that Instagram has 52.5 million monthly active users in the U.S., or about one-sixth of all smartphone users in the country, adding that 78.8 percent of those users are between the ages of 12 and 34. Principal analyst Debra Aho Williamson said in an email to AllFacebook: With 300 million monthly users, Instagram’s audience…